/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package pe.gob.pnp.digitalizar.servlets;

import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import javax.servlet.*;
import javax.servlet.http.*;

/**
 *
 * @author Eduardo
 */
public class VistaPrevia extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setDateHeader("Expires", 0);
        response.setContentType("image/jpeg");
        OutputStream out = response.getOutputStream();

        try {
            HttpSession session = request.getSession();
            String rutaImagen = (String) session.getAttribute("archivoSeleccionado");
            File archivo = new File(rutaImagen);
            BufferedImage imagen = ImageIO.read(archivo);
            /*
            int ancho = 800;
            int alto = 850;
            BufferedImage img = new BufferedImage(ancho, alto,BufferedImage.TYPE_INT_RGB);
            Graphics2D g = img.createGraphics();
            g.drawImage(imagen, 0, 0, ancho, alto, null);
            g.dispose();
             */
            ImageIO.write(imagen, "jpg", out);
        } finally { 
            
        }
    } 

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    } 

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
